Greenhills (Irish: Na Glaschnoic) is a suburb of Dublin in Ireland. It sits between Kimmage, Tallaght, Templeogue, Terenure and Walkinstown, and includes the residential developments of Greenhills Estate, Greenpark, Limekiln Estate and Temple Manor. Greenhills is in the Dublin 12 postcode.
The area was mostly farmland until expansion in the 1950s and 1960s led to the building of new housing estates. However, Greenhills, situated just below the esker upon which the Greenhills Road now runs, may have housed settlements as long ago as 1800 BC. An urn dating from that time, found in the late 1890s in the former quarry between the Greenhills Road and St. Columba's Road, is on display in the National Museum of Ireland.
The name comes from the sand-based hills that were formerly prevalent in the area. Most of these were excavated for building work; the last remaining hill, known locally as the "Horseshoe," was flattened in 2003.
Tymon Park is situated in the old townland of Greenhills and is located to the south of the Limekiln estate. It is the second-largest park in Dublin, after the Phoenix Park, and the largest in the area administered by South Dublin County Council. Tymon Park is a local park, with the River Poddle and its man-made lakes providing a backdrop. The M50 motorway splits the Greenhills side of the park from Kilnamanagh and the Tymon North estate (both in Tallaght). A smaller park, Greenhills Park, colloquially known as "Comp Field," is also administered by the County Council and is used for association football.
The Church of the Holy Spirit is the local Catholic church. It has a verdigris copper roof. The church stands beside a community centre, which was completed in the 1990s, and the clubhouse of the local football club, Greenhills AFC, formerly Greenhills Boy's AFC.